eval { use Fictitious::Module };

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Use require, not use.  use is executed at compile time of that code fragment, before the eval executes.

See also BEGIN — because use behaves like* a require with BEGIN wrapped around it.

___

*  roughly like, that is.  If you want to import stuff, you have to call import explicitly when you use require.  See the mentioned docs for details.

In reply to Re: Base script behavior on presence (or non-) of a module by Eliya
in thread Base script behavior on presence (or non-) of a module by chexmix

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